/*
文件名:MD5Class.nut
路径:Dps_A/BaseClass/MD5Class/MD5Class.nut
创建日期:2024-09-20	00:06
文件用途:MD5类
*/
class MD5 {
    MD5_Init_ptr = Module.getExportByName(null, "MD5_Init");
    MD5_Update_ptr = Module.getExportByName(null, "MD5_Update");
    MD5_Final_ptr = Module.getExportByName(null, "MD5_Final");

    function MD5_Init(Ctx) {
        Sq_CallFunc(MD5_Init_ptr, "void", ["pointer"], Ctx);
    }

    function MD5_Update(Ctx, Buffer, Size) {
        Sq_CallFunc(MD5_Update_ptr, "void", ["pointer", "pointer", "int"], Ctx, Buffer, Size);
    }

    function MD5_Final(Ctx, Result) {
        Sq_CallFunc(MD5_Final_ptr, "void", ["pointer", "pointer"], Ctx, Result);
    }

    function GetFile(FileName) {
        local Io = IO(FileName, "r+");

        local Ctx = Memory.alloc(0x100);
        MD5.MD5_Init(Ctx.C_Object);

        while (true) {
            local Buffer = Memory.alloc(0x1000);
            local Res = Io.ReadBuffer(0x1000);
            if (Res.count == 0) break;
            MD5.MD5_Update(Ctx.C_Object, Memory.allocUtf8String(Res.str).C_Object, Res.count);
        }

        local Result = Memory.alloc(16);
        MD5.MD5_Final(Result.C_Object, Ctx.C_Object);
        Io.Close();
        return Result.readUtf8String(16);
    }
}